THE DEPERTURBATION OF THE $2^{1}\Delta_{g}$ AND $G^{1}\Pi_{g}$ STATES OF $^{7}Li_{2}$
Jianbing Qi, X. Wang, A. M. Lyyra, Li Li · The Knowledge Bank (The Ohio State University) · 1998
The $^{7}Li_{2} G^{1}\\Pi_{g}$ is badly perturbed by both $^{1}\\Sigma^{+}_{g}$ states as well as the $2^{1}\\Delta_{g}$ state. By using Optical-Optical Double Resonance through $G^{1}\\Pi_{g}\\sim 2^{1}\\Delta_{g}-A^{1}\\Sigma^{+}_{u}-X ^{1}\\Sigma^{+}_{g}$ scheme, we observed a series of vibrational-rotational states of the $2^{1}\\Delta_{g}$ state through the perturbations of the $G^{1}\\Pi_{g}$ state. We have observed the $G^{1}\\Pi_{g} v=15 \\sim 2^{1}\\Delta_{g}v=5; G^{1}\\Pi_{g} v=12\\sim 2^{1}\\Delta_{g} v=3;G^{1}\\Pi_{g} v=11\\sim 2^{1}\\Delta_{g} v=2$ bands and have deperturbed these bands with standard deviations comparable to the experimental error. The $G^{1}\\Pi_{g}$ state $perturbations^{a}$ are partially due to this L-uncoupling interaction between the $G^{1}\\Pi_{g}$ and the $2^{1}\\Pi_{g}$ states.